Terminals & Connectors Manufacturer | TONFUL Electric - High Quality & Customizable
TONFUL Electric is a leading OEM manufacturer of high-performance terminals and connectors. We offer a wide range of custom electrical connectors, terminal blocks, and wiring solutions. Get a free quote and datasheet today!
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Our Terminals & Connectors Product Range
Vinyl Insulated Terminals
Secure vinyl-insulated terminals by TONFUL. Premium PVC protection against shorts/vibrations. For automotive, machinery, appliances. Multi-size/color options.
Non-Insulated Terminals
Non-insulated terminals by TONFUL. Pure copper construction for optimal conductivity. Cold-pressed plating ensures corrosion resistance. Ideal for high-density electrical connections.
Nylon-Insulated Terminals
Nylon-insulated terminals by TONFUL. Superior dielectric strength and heat resistance. V0 flame-retardant grade. Perfect for high-temperature industrial applications.
Heat Shrink Terminals
Heat shrink terminals by TONFUL. Waterproof sealed connections with superior insulation. Shrinks at 120°C. Ideal for harsh environment applications.
Wire Ferrule Terminals
Wire ferrules by TONFUL. Prevent strand fraying in screw terminals. Copper crimp design ensures secure connections. Essential for fine-stranded wire applications.
Wire Accessories
Wire accessories by TONFUL. Complete solutions for terminal blocks, connectors, and wiring systems. Ensure safety, reliability, and efficiency in every electrical connection.
Why Choose TONFUL Terminals & Connectors?
Our heat shrink terminals deliver superior performance with advanced dual-wall technology and comprehensive certifications
Uncompromising Quality & Durability
Our products are manufactured from premium materials—high-conductivity copper, precision-engineered plastics, and superior plating. Each component undergoes rigorous testing to ensure exceptional performance, corrosion resistance, and long-term reliability in the most demanding environments.
Extensive Product Range & Customization
From standard vinyl-insulated rings to specialized heat-shink and nylon terminals, we offer an extensive catalog to meet diverse needs. As an OEM expert, we provide complete custom solutions, tailoring products to your exact specifications, including size, material, and branding.
Certified Safety & Compliance
Safety is paramount. Our connectors meet international standards and hold relevant certifications (such as UL, CE, RoHS). This guarantees our products are flame-retardant, environmentally compliant, and deliver secure, stable electrical connections you can trust.
Engineering Expertise & Technical Support
Backed by deep industry knowledge, our engineering team offers more than just products—we provide solutions. Get expert technical support to select the perfect component for your application, optimize your design, and solve complex connectivity challenges.
Competitive Pricing & Cost-Effectiveness
We leverage efficient manufacturing processes and economies of scale to deliver high-quality terminals and connectors at competitive prices. We are committed to providing exceptional value, helping you reduce project costs without sacrificing performance.
Global Logistics & Reliable Supply
We understand the importance of on-time delivery. Our robust global supply chain and logistics network ensure your orders are processed efficiently and delivered reliably, minimizing downtime and keeping your production lines running smoothly.
Professional Installation Guide
Follow these steps for optimal performance and longevity of your terminals
1.Select the Correct Terminal and Tool
Choose a terminal matching the wire gauge and application. Use a dedicated crimping tool designed for the terminal type.
2.Strip the Wire Precisely
Remove insulation to the length specified by the terminal manufacturer. Avoid nicking or damaging the conductor strands.
3.Insert the Wire Fully
Place the stripped wire end completely into the terminal barrel until the insulation reaches the designated stop point.
4.Crimp Securely with the Proper Tool
Position the terminal in the tool’s correct die slot and crimp with firm, even pressure. Listen for the tool’s click (if applicable).
5.Tug-Test the Connection
Gently pull the wire and terminal to ensure a secure mechanical bond. The wire should not detach or shift.
6.Apply Environmental Protection (If Needed)
For harsh environments, add heat-shrink tubing, dielectric grease, or sealing boots to prevent corrosion and moisture ingress.
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We provide samples for free, you just need to tell us what you need
MORE THAN JUST A TERMINALS & CONNECTORS MANUFACTURER
Service Consultation
Whether your terminal requirements are straightforward or complex, our team provides expert advice and technical consultation. For more intricate projects, we offer in-depth engineering support to ensure optimal product selection and application, guaranteeing safety and efficiency in your electrical systems.
Product Recommendations
Unsure which terminal suits your system? Our specialists provide free, customized recommendations based on your specific operational and environmental requirements, ensuring you get the perfect fit for your electrical protection needs.
Installation Support
Need help with installation? Our technical team is available to answer your questions or provide hands-on support. For larger projects, we can even dispatch an engineer to your site for on-the-ground assistance, ensuring your terminals are installed correctly and function seamlessly within your electrical network.
Logistics Support
If you lack a reliable freight forwarder, we can arrange transportation from our factory to your project site at no extra cost. Our logistics team ensures timely and secure delivery to keep your project on schedule, minimizing downtime and delays.
Frequently Asked Questions
We have compiled some common questions from our clients. If your question isn’t included here, our customer service is always available to help. We’d love to talk with you.
Q1: What is the difference between insulated and non-insulated terminals?
A: Insulated terminals have a plastic (e.g., vinyl, nylon) sleeve that provides electrical isolation, protection from corrosion, and physical abrasion. Non-insulated terminals are bare metal, used where space is limited and where the connection is already protected within an enclosure or from accidental contact.
Q2: How do I choose the correct wire terminal for my application?
A: Selecting the right terminal depends on three key factors:
Wire Gauge: The terminal must be the correct size to fit your wire.
Application/Current Load: The terminal must be rated to handle the electrical current and suited for the environment (e.g., high heat, vibration, moisture).
Connector Type: Match the terminal to the type of connection point (e.g., ring for screw posts, spade for quick-disconnect, pin for plugs).
Q3: Why is using a dedicated crimping tool so important?
A: Professional crimping tools are calibrated to apply the exact right amount of pressure. This creates a gas-tight connection that prevents oxygen and moisture from entering, which eliminates corrosion and ensures optimal conductivity and long-term reliability. Using pliers or the wrong tool can result in a weak, loose, or over-crimped connection that will fail.
Q4: What do the different colors (red, blue, yellow) on insulated terminals mean?
A: The colors are a standard industry code for the terminal size, which corresponds to the range of wire gauges it can accommodate:
• Red: Typically for 22-16 AWG (small wires).
• Blue: Typically for 16-14 AWG (medium wires).
• Yellow: Typically for 12-10 AWG (larger wires).
Always check the manufacturer’s specifications to be sure.
Q5: Can I reuse a wire terminal?
A: It is not recommended. Once a terminal has been crimped, the metal barrel is formed specifically to that wire. Reusing it will result in a poor mechanical grip and a weak electrical connection, which can become a safety hazard.
Q6: What are the benefits of using heat shrink terminals?
A: Heat shrink terminals provide a completely waterproof and sealed connection. When heated, the adhesive-lined sleeve shrinks tightly around the wire and terminal, offering superior strain relief and excellent protection against moisture, chemicals, and corrosion. They are ideal for automotive, marine, and outdoor applications.
Q7: What is a wire ferrule, and when should I use one?
A: A wire ferrule is a small metal tube placed on the end of a fine-stranded wire before it is inserted into a screw-type terminal block. It prevents the strands from fraying and ensures all strands are captured, leading to a more reliable, gas-tight connection and preventing loose strands from causing short circuits.
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